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- W2002086019 abstract "The transform used in most image and video coding standards is the separable 2-D discrete cosine transform (DCT), which has been proven to be a robust approximation of the optimal Karhunen-Loeve transform (KLT) for the 1st-order Markov sources with a large correlation coefficient. However, such separable 2-D DCT surely is not the best choice when it is applied on some residual or directional signals. Based on the butterfly architecture for DCT's fast implementation, we present in this paper a novel design of non-separable 2-D transforms that get much closer to the KLT but at the implementation cost no bigger than that of the DCT. The critical issue in our design is how to pair all node-variables in various stages of the butterfly structure. We propose a near-optimal pairing strategy to solve this problem and present some examples to demonstrate its effectiveness." @default.
- W2002086019 created "2016-06-24" @default.
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- W2002086019 date "2012-05-01" @default.
- W2002086019 modified "2023-10-01" @default.
- W2002086019 title "Design of low-complexity, non-separable 2-D transforms based on butterfly structures" @default.
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- W2002086019 doi "https://doi.org/10.1109/iscas.2012.6271927" @default.
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